/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iceberg.avro;

import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.UUID;
import org.apache.avro.Conversion;
import org.apache.avro.LogicalType;
import org.apache.avro.LogicalTypes;
import org.apache.avro.Schema;
import org.apache.avro.generic.GenericData;
import org.apache.avro.generic.GenericFixed;

public class UUIDConversion extends Conversion<UUID> {
  @Override
  public Class<UUID> getConvertedType() {
    return UUID.class;
  }

  @Override
  public String getLogicalTypeName() {
    return LogicalTypes.uuid().getName();
  }

  @Override
  public UUID fromFixed(GenericFixed value, Schema schema, LogicalType type) {
    ByteBuffer buffer = ByteBuffer.wrap(value.bytes());
    buffer.order(ByteOrder.BIG_ENDIAN);
    long mostSigBits = buffer.getLong();
    long leastSigBits = buffer.getLong();
    return new UUID(mostSigBits, leastSigBits);
  }

  @Override
  public GenericFixed toFixed(UUID value, Schema schema, LogicalType type) {
    ByteBuffer buffer = ByteBuffer.allocate(16);
    buffer.order(ByteOrder.BIG_ENDIAN);
    buffer.putLong(value.getMostSignificantBits());
    buffer.putLong(value.getLeastSignificantBits());
    return new GenericData.Fixed(schema, buffer.array());
  }
}
